crash report - unsure of cause

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 18/06/14 12:57 PM
Description: Getting block state

java.lang.IllegalArgumentException: Cannot set property ayj{name=facing, clazz=class dt, values=[north, south, west, east]} to down, it is not an allowed value
	at axy.a(SourceFile:131)
	at aqd.a(SourceFile:135)
	at ayt.h(SourceFile:446)
	at alu.q(SourceFile:716)
	at ou.a(SourceFile:810)
	at ou.ah(SourceFile:800)
	at ou.c(SourceFile:194)
	at net.minecraft.server.MinecraftServer.w(SourceFile:570)
	at net.minecraft.server.MinecraftServer.v(SourceFile:506)
	at cof.v(SourceFile:132)
	at net.minecraft.server.MinecraftServer.run(SourceFile:422)
	at java.lang.Thread.run(Unknown Source)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at axy.a(SourceFile:131)
	at aqd.a(SourceFile:135)

-- Block being got --
Details:
	Location: World: (-1105,51,-662), Chunk: (at 15,3,10 in -70,-42; contains blocks -1120,0,-672 to -1105,255,-657), Region: (-3,-2; contains chunks -96,-64 to -65,-33, blocks -1536,0,-1024 to -1025,255,-513)
Stacktrace:
	at ayt.h(SourceFile:446)
	at alu.q(SourceFile:716)
	at ou.a(SourceFile:810)
	at ou.ah(SourceFile:800)
	at ou.c(SourceFile:194)

-- Affected level --
Details:
	Level name: Diversity 2
	All players: 1 total; [ox['qmagnet'/0, l='Diversity 2', x=-1032.66, y=97.74, z=-790.93]]
	Chunk stats: ServerChunkCache: 924 Drop: 0
	Level seed: 5341853392815717756
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 2;100x0;2;village
	Level spawn location: -64.00,11.00,-600.00 - World: (-64,11,-600), Chunk: (at 0,0,8 in -4,-38; contains blocks -64,0,-608 to -49,255,-593), Region: (-1,-2; contains chunks -32,-64 to -1,-33, blocks -512,0,-1024 to -1,255,-513)
	Level time: 30826736 game time, 6000 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 1 (now: false), thunder time: 1 (now: false)
	Level game mode: Game mode: adventure (ID 2). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:570)
	at net.minecraft.server.MinecraftServer.v(SourceFile:506)
	at cof.v(SourceFile:132)
	at net.minecraft.server.MinecraftServer.run(SourceFile:422)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 14w25a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 619997488 bytes (591 MB) / 1185415168 bytes (1130 MB) up to 7635730432 bytes (7282 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx8G
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [ox['qmagnet'/0, l='Diversity 2', x=-1032.66, y=97.74, z=-790.93]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.